Arch Capital Group Ltd.
US ˙ NasdaqGS ˙ BMG0450A1053

SecurityACGL / Arch Capital Group Ltd.
InstitutionCwm, Llc
Latest Disclosed Ownership246,167 shares
Latest Disclosed Value $ 23,629,571
Cwm, Llc reports 8.18% decrease in ownership of ACGL / Arch Capital Group Ltd.

On May 14, 2026 - Cwm, Llc filed a 13F-HR form disclosing ownership of 246,167 shares of Arch Capital Group Ltd. (US:ACGL) valued at $23,629,570 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 268,083 shares of Arch Capital Group Ltd.. This represents a change in shares of -8.18% during the quarter. The current value of the position is $21,635,618 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-14 2026-03-31 13F ARCH CAP GROUP ORD G0450A105 246,167 -21,916 -8.18 23,630 94,416.00 0.0621
2026-01-26 2025-12-31 13F ARCH CAP GROUP ORD G0450A105 268,083 10,485 4.07 26 8.70 0.0697
2025-10-15 2025-09-30 13F ARCH CAP GROUP ORD G0450A105 257,598 3,499 1.38 23 0.00 0.0703
2025-07-25 2025-06-30 13F ARCH CAP GROUP ORD G0450A105 254,099 2,778 1.11 23 -4.17 0.0816
2025-05-01 2025-03-31 13F ARCH CAP GROUP ORD G0450A105 251,321 -2,996 -1.18 24 4.35 0.0964
2025-02-04 2024-12-31 13F ARCH CAP GROUP ORD G0450A105 254,317 -4,555 -1.76 23 -17.86 0.0975
2024-10-08 2024-09-30 13F ARCH CAP GROUP ORD G0450A105 258,872 -13,520 -4.96 29 3.70 0.1246
2024-07-10 2024-06-30 13F ARCH CAP GROUP ORD G0450A105 272,392 -15,820 -5.49 27 3.85 0.1296
2024-04-05 2024-03-31 13F ARCH CAP GROUP ORD G0450A105 288,212 2,958 1.04 27 23.81 0.1295
2024-02-01 2023-12-31 13F ARCH CAP GROUP ORD G0450A105 285,254 -18,657 -6.14 21 -12.50 0.1139
2023-10-11 2023-09-30 13F ARCH CAP GROUP ORD G0450A105 303,911 1,229 0.41 24 9.09 0.1485
2023-08-03 2023-06-30 13F ARCH CAP GROUP ORD G0450A105 302,682 293,862 3,331.77 23 0.1400
2023-05-01 2023-03-31 13F ARCH CAP GROUP ORD G0450A105 8,820 803 10.02 1 0.0040
2023-02-01 2022-12-31 13F ARCH CAP GROUP ORD G0450A105 8,017 754 10.38 1 -100.00 0.0037
2022-10-27 2022-09-30 13F ARCH CAP GROUP ORD G0450A105 7,263 5,560 326.48 331 329.87 0.0026
2022-07-28 2022-06-30 13F ARCH CAP GROUP ORD G0450A105 1,703 545 47.06 77 37.50 0.0006
2022-04-21 2022-03-31 13F ARCH CAP GROUP ORD G0450A105 1,158 400 52.77 56 64.71 0.0004
2022-01-31 2021-12-31 13F ARCH CAP GROUP ORD G0450A105 758 289 61.62 34 88.89 0.0002
2021-09-15 2021-06-30 13F/A-1 ARCH CAP GROUP ORD G0450A105 469 0 0.00 18 0.00 0.0001
2021-07-29 2021-06-30 13F ARCH CAP GROUP ORD G0450A105 469 0 18 0.0001
2021-09-15 2021-03-31 13F/A-1 ARCH CAP GROUP ORD G0450A105 469 0 0.00 18 0.00 0.0001
2021-04-27 2021-03-31 13F ARCH CAP GROUP ORD G0450A105 469 0 18 0.0002
2021-09-15 2020-12-31 13F/A-1 ARCH CAP GROUP ORD G0450A105 469 0 0.00 18 0.00 0.0001
2021-01-27 2020-12-31 13F ARCH CAP GROUP ORD G0450A105 469 0 17 0.0002
2021-09-15 2020-09-30 13F/A-1 ARCH CAP GROUP ORD G0450A105 469 0 0.00 18 0.00 0.0001
2020-10-19 2020-09-30 13F ARCH CAP GROUP ORD G0450A105 668 199 20 0.0002
2021-09-15 2020-06-30 13F/A-1 ARCH CAP GROUP ORD G0450A105 469 0 0.00 18 0.00 0.0001
2020-07-22 2020-06-30 13F ARCH CAP GROUP ORD G0450A105 374 -95 11 0.0001
2021-09-15 2020-03-31 13F/A-1 ARCH CAP GROUP ORD G0450A105 469 0 0.00 18 0.00 0.0001
2020-04-28 2020-03-31 13F ARCH CAP GROUP ORD G0450A105 754 285 21 0.0003
2021-09-14 2019-12-31 13F/A-1 ARCH CAP GROUP ORD G0450A105 469 0 0.00 18 0.00 0.0001
2021-09-14 2019-09-30 13F/A-1 ARCH CAP GROUP ORD G0450A105 469 0 0.00 18 0.00 0.0001
2021-09-14 2019-06-30 13F/A-1 ARCH CAP GROUP ORD G0450A105 469 0 0.00 18 0.00 0.0001
2021-09-02 2019-03-31 13F/A-1 ARCH CAP GROUP ORD G0450A105 469 442 1,637.04 18 1,700.00 0.0001
2019-01-25 2018-12-31 13F ARCH CAP GROUP ORD G0450A105 27 27 1 0.0000
2018-01-16 2017-12-31 13F ARCH CAP GROUP ORD G0450A105 0 -18 -100.00 0 -100.00
2017-10-16 2017-09-30 13F ARCH CAP GROUP ORD G0450A105 18 18 2 0.0001
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.